Ep. 35: Sonic is imprisoned while allies and Eggman race to Prison Island for the Chaos Emeralds.
Aired on November 30, 2003

35
Sonic is confined to an isolation cell on Prison Island. Chris and Tanaka board a swan boat to rescue him, while Amy and Tails travel to the location using the X-Tornado. Meanwhile, Eggman attempts to infiltrate the island again, accompanied by Shadow and Rouge. Their shared objective is to obtain the Chaos Emeralds. This creates a complex situation where multiple groups converge on the same location for different reasons, with some aiming to save Sonic and others seeking the powerful gems.
Episodes
- Ep. 31 · Sonic infiltrates Eggman's base while Gamma battles Beta to free animals
- Ep. 32 · Chaos survives, evolves into Perfect Chaos, and Sonic's body shines revealing the truth
- Ep. 33 · Eggman infiltrates Prison Island to access Project Shadow after discovering Gerald Robotnik's connection.
- Ep. 34 · Sonic is arrested by GUN for Project Shadow theft and escapes Prison Island chase
- Ep. 35 · Sonic is imprisoned while allies and Eggman race to Prison Island for the Chaos Emeralds.
- Ep. 36 · Chris survives Prison Island explosion and arrives on Space Colony ARK during Shadow's Chaos Control.
- Ep. 37 · Sonic and allies travel to Space Colony ARK to thwart Eggman's plan to destroy Earth.
- Ep. 38 · Sonic and Shadow fight while Space Colony ARK becomes a bomb threatening Earth
- Ep. 39 · Vector, Espio, and Charmy search for Cream while Eggman repairs the moon.